Brake-drum construction



J. R. BARTHOLOMEW BRAKE DRUM CONSTRUCTION Original Filed NOW 1922 INVENTOR JOHN R.BARTHOLOMEW ATTORNEY Patented Oct. 13, 1925."

UNITED STATES PATENT oFncE.

oan a. BABTHOLOMEW, or monrcmim, EW JERSEY, AssIeNon r mnnwns'rme nousn AIR 3am COMPANY, or wrtmnanme, rnnnsyrvanm, A coaromrxon OF PENNSYLVANIA.

BRAKE-DRUM consriwcrron.

origlnal'application filed November 28, 1922, Serial No. 603,775. Divided and thir'applicetion med January 4," 1924.

To all whom it may concern:

Be it known that 1, JOHN R. BARTHow- MEW, a citizen of the United States, residing at Montclair, in the county of Essex and State of New Jersey have invented new and useful Improvements in Brake-Drum Constructions, of which the following is a specification.

This invention relates to brake mechanisms of the drum type, and more particularly as employed on motor vehicles.

The principal object of my invention is to provide renewable members adapted to be applied to a brake drum and which may be readily removed and applied when the members become worn by reason of the frictional engagement of the brakeshoes therewith.

The present application is a division of application Serial N 0. 603,77 5; filed November 28, 1922.

in the accompanying drawing; Fig. l is a face view of a brake drum, showing the improved wear members applied thereto;

Fig, 2 a section on the line 2-2 of Fig. 1; and Fig. 3 a section on the line 3-3 of Fig. 1.

As shown in the drawing,- a brake drum 1 is provided, which is adapted to be secured to the wheel of a motor vehicle in the usual manner. Accordingto my invention, in order to provide a renewable braking surface forthe internal face of the brake drum 1, I employ a pair of semi-cylindrical metal bands 10 adapted to'engage the internal annular face of the brake drum. A lug 11 is provided at each endfiof each band 10 and at one side only. W

' are positioned in the drum, there is a space provided between the adjacent ends of the two liners for receiving a wedge member.

Said wedge member may comprise a wedge 'ortion 12 carried by a plate 13 and the werlge portion 12 of thewedge member is inserted in the space between the adjacent en the liners 10 Serial No. 684,383

ends of the liners. Bolts 15 are then passed through alind openings in the flange 14 of the drum 1, the lugs 11 and the plate 13.

When the bolts 15 are drawn up, the wedgeportion 12 acts to spread the liners 10, so as to efi'ect a tight frictional engagement of the liners with the internal face of the brake mechanism.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination with a brake drum of renewable liners mounted within said drum and comprising segments presenting an internal cylindrical braking surface within the drum and means for securing said segments to the brake drum, the segments being removable by a movement par allel to the axis of the drum.

2. The combination with a brake drum having an internal annular surface concentrio with the axis of the drum and having a flangein a .plane at right angles to the axis of the drum, of renewable wearing segments engaging said annular surface and.

provided withlugs facing said flange and bolts extending throu' h openings in said flange and said lugs or securing the segments to the drum. v

3. The combination with a brake drum,

of cylindrical wear segments mounted in said drum and a wedging member interposedbetween adjacent ends of the segments for expandin the segments into engagement with the rum. I

In. testimony whereof I have hereunto set 'my hand JOHN R. BARTHOLOMEW... 

